/*
* rasqal_query_results_write_json1:
* @iostr: #raptor_iostream to write the query to
* @results: #rasqal_query_results query results format
* @base_uri: #raptor_uri base URI of the output format
*
* Write a JSON version of the query results format to an
* iostream in a format - INTERNAL.
*
* If the writing succeeds, the query results will be exhausted.
*
* Return value: non-0 on failure
**/
static int
rasqal_query_results_write_json1(rasqal_query_results_formatter* formatter,
raptor_iostream *iostr,
rasqal_query_results* results,
raptor_uri *base_uri)
{
rasqal_world* world = rasqal_query_results_get_world(results);
rasqal_query* query = rasqal_query_results_get_query(results);
int i;
int row_comma;
int column_comma = 0;
rasqal_query_results_type type;
type = rasqal_query_results_get_type(results);
if(type != RASQAL_QUERY_RESULTS_BINDINGS &&
type != RASQAL_QUERY_RESULTS_BOOLEAN) {
rasqal_log_error_simple(query->world, RAPTOR_LOG_LEVEL_ERROR,
&query->locator,
"Cannot write JSON for %s query result format",
rasqal_query_results_type_label(type));
return 1;
}
raptor_iostream_counted_string_write("{\n", 2, iostr);
/* Header */
raptor_iostream_counted_string_write(" \"head\": {\n", 12, iostr);
if(rasqal_query_results_is_bindings(results)) {
raptor_iostream_counted_string_write(" \"vars\": [ ", 14, iostr);
for(i = 0; 1; i++) {
const unsigned char *name;
name = rasqal_query_results_get_binding_name(results, i);
if(!name)
break;
/* 'x', */
if(i > 0)
raptor_iostream_counted_string_write(", ", 2, iostr);
raptor_iostream_write_byte('\"', iostr);
raptor_iostream_string_write(name, iostr);
raptor_iostream_write_byte('\"', iostr);
}
raptor_iostream_counted_string_write(" ]\n", 3, iostr);
}
/* FIXME - could add link inside 'head': */
/* End Header */
raptor_iostream_counted_string_write(" },\n", 5, iostr);
/* Boolean Results */
if(rasqal_query_results_is_boolean(results)) {
raptor_iostream_counted_string_write(" ", 2, iostr);
rasqal_iostream_write_json_boolean(iostr, "boolean",
rasqal_query_results_get_boolean(results));
goto results3done;
}
/* Variable Binding Results */
raptor_iostream_counted_string_write(" \"results\": {\n", 15, iostr);
if(query) {
raptor_iostream_counted_string_write(" ", 4, iostr);
rasqal_iostream_write_json_boolean(iostr, "ordered",
(rasqal_query_get_order_condition(query, 0) != NULL));
raptor_iostream_counted_string_write(",\n", 2, iostr);
raptor_iostream_counted_string_write(" ", 4, iostr);
rasqal_iostream_write_json_boolean(iostr, "distinct",
rasqal_query_get_distinct(query));
raptor_iostream_counted_string_write(",\n", 2, iostr);
}
raptor_iostream_counted_string_write(" \"bindings\" : [\n", 19, iostr);
row_comma = 0;
while(!rasqal_query_results_finished(results)) {
if(row_comma)
raptor_iostream_counted_string_write(",\n", 2, iostr);
/* Result row */
raptor_iostream_counted_string_write(" {\n", 8, iostr);
column_comma = 0;
for(i = 0; i<rasqal_query_results_get_bindings_count(results); i++) {
const unsigned char *name = rasqal_query_results_get_binding_name(results, i);
rasqal_literal *l = rasqal_query_results_get_binding_value(results, i);
if(column_comma)
raptor_iostream_counted_string_write(",\n", 2, iostr);
/* <binding> */
raptor_iostream_counted_string_write(" \"", 9, iostr);
raptor_iostream_string_write(name, iostr);
raptor_iostream_counted_string_write("\" : { ", 6, iostr);
if(!l) {
raptor_iostream_string_write("\"type\": \"unbound\", \"value\": null", iostr);
} else {
const unsigned char* str;
size_t len;
switch(l->type) {
case RASQAL_LITERAL_URI:
raptor_iostream_string_write("\"type\": \"uri\", \"value\": \"", iostr);
str = RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_counted_string(l->value.uri, &len));
raptor_string_ntriples_write(str, len, '"', iostr);
raptor_iostream_write_byte('"', iostr);
break;
case RASQAL_LITERAL_BLANK:
raptor_iostream_string_write("\"type\": \"bnode\", \"value\": \"", iostr);
raptor_string_ntriples_write(l->string, l->string_len, '"', iostr);
raptor_iostream_write_byte('"', iostr);
break;
case RASQAL_LITERAL_STRING:
raptor_iostream_string_write("\"type\": \"literal\", \"value\": \"", iostr);
raptor_string_ntriples_write(l->string, l->string_len, '"', iostr);
raptor_iostream_write_byte('"', iostr);
if(l->language) {
raptor_iostream_string_write(",\n \"xml:lang\" : \"", iostr);
raptor_iostream_string_write(RASQAL_GOOD_CAST(const unsigned char*, l->language), iostr);
raptor_iostream_write_byte('"', iostr);
}
if(l->datatype) {
raptor_iostream_string_write(",\n \"datatype\" : \"", iostr);
str = RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_counted_string(l->datatype, &len));
raptor_string_ntriples_write(str, len, '"', iostr);
raptor_iostream_write_byte('"', iostr);
}
break;
case RASQAL_LITERAL_PATTERN:
case RASQAL_LITERAL_QNAME:
case RASQAL_LITERAL_INTEGER:
case RASQAL_LITERAL_XSD_STRING:
case RASQAL_LITERAL_BOOLEAN:
case RASQAL_LITERAL_DOUBLE:
case RASQAL_LITERAL_FLOAT:
case RASQAL_LITERAL_VARIABLE:
case RASQAL_LITERAL_DECIMAL:
case RASQAL_LITERAL_DATE:
case RASQAL_LITERAL_DATETIME:
case RASQAL_LITERAL_UDT:
case RASQAL_LITERAL_INTEGER_SUBTYPE:
case RASQAL_LITERAL_UNKNOWN:
default:
rasqal_log_error_simple(world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Cannot turn literal type %u into XML",
l->type);
}
}
/* End Binding */
raptor_iostream_counted_string_write(" }", 2, iostr);
column_comma = 1;
}
static void
roqet_query_walk(rasqal_query *rq, FILE *fh, int indent) {
rasqal_query_verb verb;
int i;
rasqal_graph_pattern* gp;
raptor_sequence *seq;
verb = rasqal_query_get_verb(rq);
roqet_write_indent(fh, indent);
fprintf(fh, "query verb: %s\n", rasqal_query_verb_as_string(verb));
i = rasqal_query_get_distinct(rq);
if(i != 0) {
roqet_write_indent(fh, indent);
fprintf(fh, "query asks for distinct results\n");
}
i = rasqal_query_get_limit(rq);
if(i >= 0) {
roqet_write_indent(fh, indent);
fprintf(fh, "query asks for result limits %d\n", i);
}
i = rasqal_query_get_offset(rq);
if(i >= 0) {
roqet_write_indent(fh, indent);
fprintf(fh, "query asks for result offset %d\n", i);
}
seq = rasqal_query_get_bound_variable_sequence(rq);
if(seq && raptor_sequence_size(seq) > 0) {
fprintf(fh, "query bound variables (%d): ",
raptor_sequence_size(seq));
i = 0;
while(1) {
rasqal_variable* v = (rasqal_variable*)raptor_sequence_get_at(seq, i);
if(!v)
break;
if(i > 0)
fputs(", ", fh);
roqet_query_write_variable(fh, v);
i++;
}
fputc('\n', fh);
}
gp = rasqal_query_get_query_graph_pattern(rq);
if(!gp)
return;
seq = rasqal_query_get_construct_triples_sequence(rq);
if(seq && raptor_sequence_size(seq) > 0) {
roqet_write_indent(fh, indent);
fprintf(fh, "query construct triples (%d) {\n",
raptor_sequence_size(seq));
i = 0;
while(1) {
rasqal_triple* t = rasqal_query_get_construct_triple(rq, i);
if(!t)
break;
roqet_write_indent(fh, indent + 2);
fprintf(fh, "triple #%d { ", i);
rasqal_triple_print(t, fh);
fputs(" }\n", fh);
i++;
}
roqet_write_indent(fh, indent);
fputs("}\n", fh);
}
/* look for binding rows */
seq = rasqal_query_get_bindings_variables_sequence(rq);
if(seq) {
roqet_write_indent(fh, indent);
fprintf(fh, "bindings variables (%d): ", raptor_sequence_size(seq));
i = 0;
while(1) {
rasqal_variable* v = rasqal_query_get_bindings_variable(rq, i);
if(!v)
break;
if(i > 0)
fputs(", ", fh);
roqet_query_write_variable(fh, v);
i++;
}
fputc('\n', fh);
seq = rasqal_query_get_bindings_rows_sequence(rq);
fprintf(fh, "bindings rows (%d) {\n", raptor_sequence_size(seq));
i = 0;
while(1) {
rasqal_row* row;
row = rasqal_query_get_bindings_row(rq, i);
if(!row)
break;
roqet_write_indent(fh, indent + 2);
fprintf(fh, "row #%d { ", i);
rasqal_row_print(row, fh);
fputs("}\n", fh);
i++;
}
}
fputs("query ", fh);
roqet_graph_pattern_walk(gp, -1, fh, indent);
}
